There are many examples of zero-start odometers, such as: the distance from the museum to the post office is 37 1 m, and the distance from the post office to the school is 2 15 m. How many meters is the distance from the museum to the school? There is also to find out the mileage between the two cities and draw a line graph. There is also a calculation with disjunction. Another person just gave the distance between two points and worked out the distance between two points. There are many questions of this type, which are not difficult to do. As long as you learn the solution of one example, you can easily solve other problems.